So this is why Sirius Black's house elf, Kreacher, was so mean in Harry Potter

Unlike Dobby, the kind-hearted, heroic house elf from Harry Potter who made us all weep when he tragically died on a beach in Harry's arms, there was another elf who was less loveable.

Kreacher belonged to Sirius Black and he hated everyone except for pure-blood wizards. But, have you ever wondered why?

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One Reddit user has been investigating and thinks he's found a legitimate excuse for Kreacher's horrible behaviour. Could Salazar Slytherin's locket, one of the seven horcruxes be to blame?

Reddit user Kaptinkracker wrote:

I think that he is a prick in general since his first appearance because he was in possession of the amulet horcrux for a long time which is revealed in The Deathly Hollows Part 1. It is shown that the horcrux makes Ron very jealous and angry when he later has possession of the horcrux for only a short time. Therefore, when Regulus Black gave Kreacher the horcrux to hold onto, it turned Kreacher bad. The horcrux amplified the negative emotions that Ron had and similarly it makes Kreacher hate mudbloods even more and disrespect Hermoine way more than he would have if he didn't have the horcrux.

Basically the horcrux turns you into an evil version of yourself – so is that what happened to Kreacher, as it did to Ron?